Suzuki DF70A Service Manual page 18

0A-9 General Information:
Valve / Valve Guide
Item
Valve diameter
Tappet clearance
(Cold engine condition)
Valve seat angle
Valve guide to valve stem
clearance
Valve guide inside diameter
Valve guide protrusion
Valve stem outside diameter
Valve stem deflection
Valve stem runout
Valve head radial runout
Valve head thickness
Valve seat contact width
Valve spring free length
Valve spring preload
Valve spring squareness
Unit
IN mm (in.)
EX mm (in.)
IN std. mm (in.)
EX std. mm (in.)
IN —
EX —
std. mm (in.)
IN
Limit mm (in.)
std. mm (in.)
EX
Limit mm (in.)
IN,
std. mm (in.)
EX
IN,
std. mm (in.)
EX
IN std. mm (in.)
EX std. mm (in.)
IN Limit mm (in.)
EX Limit mm (in.)
IN,
Limit mm (in.)
EX
IN,
Limit mm (in.)
EX
std. mm (in.)
IN
Limit mm (in.)
std. mm (in.)
EX
Limit mm (in.)
IN std. mm (in.)
EX std. mm (in.)
std. mm (in.)
Limit mm (in.)
std. N (kg, lbs)
Limit N (kg, lbs)
Limit mm (in.)
Data
DF70AT DF80AT
27.5 (1.08)
22.9 (0.90)
0.23 – 0.27 (0.009 – 0.011)
0.30 – 0.34 (0.012 – 0.013)
30°, 45°, 60°
15°, 45°
0.020 – 0.047 (0.0008 – 0.0019)
0.070 (0.0028)
0.045 – 0.072 (0.0018 – 0.0028)
0.090 (0.0035)
5.500 – 5.512 (0.2165 – 0.2170)
10.8 – 11.6 (0.43 – 0.46)
5.465 – 5.480 (0.2152 – 0.2157)
5.440 – 5.455 (0.2142 – 0.2148)
0.14 (0.006)
0.18 (0.007)
0.05 (0.002)
0.08 (0.003)
0.75 (0.03)
0.5 (0.02)
0.95 (0.04)
0.7 (0.03)
1.1 – 1.3 (0.04 – 0.05)
1.1 – 1.3 (0.04 – 0.05)
33.1 (1.30)
31.8 (1.25)
95 – 111 (9.6 – 11.2, 21.1 – 24.6) at 28.5 mm (1.12 in)
87 (8.8, 19.4) at 28.5 mm (1.12 in)
2.0 (0.08)
DF90AT